10 - 45 minutos
Battery life diminishing.
Went very well. I followed the instructions and got it done under half an hour. I'm happy.
None actually. Just have to be careful not to turn the screws too hard. Might damage the delicate screw threads.
Tri-point Y1 Screwdriver
MacBook Pro 15" Unibody (Mid 2009-Mid 2010) Replacement Battery
iPhone 4/4S Liberation Kit